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NOTE: The adjusting pin may need to be slightly repositioned with the chain tensioning dial so that it is aligned with the position of the bar chain tensioning pin hole. n Replace the clutch cover and rotate clutch cover lock knob just enough to hold the cover in position. NOTE: The bar must be free to move for chain tension adjustment. n Lift the tip of the guide bar up to check for sag. n Remove all slack from the chain by rotating the chain tensioning dial clockwise until the chain seats snugly against the bar with the drive links in the bar groove. n Release the tip of the guide bar and, if the chain sags, turn the chain tensioning dial clockwise. Repeat this process until sag does not exist. n Hold the tip of the guide bar up and tighten the clutch cover lock knob securely. Page 27 — English Fig. 40 rotate clutch cover lock knob clockwise to secure chain tensioning dial CLUTCH COVER lock knob maintenance The chain is correctly tensioned when there is no sag on the underside of the guide bar, the chain is snug, but it can be turned by hand without binding. Ensure that the chain brake is not set. Note: If chain is too tight, it will not rotate. Loosen the clutch cover lock knob by pressing in and slightly rotating counterclockwise, then rotate the chain tensioning dial counterclockwise. Lift the tip of the guide bar up and retighten the clutch cover lock knob securely. Ensure that the chain will rotate without binding. Fig. 39 adjusting pin CLUTCH COVER SPROCKET chain tensioning pin hole Fig. 41 Fig. 42 tighten chain loosen chain MAINTENANCE ADJUSTING THE CHAIN TENSION See Figures 44 - 46. WARNING: Never touch or adjust the chain while the engine is running. The saw chain is very sharp. Always wear protective gloves when performing maintenance on the chain. Fig. 43 . Stop the engine before setting the chain tension. FlatS on drive linkS . Slightly loosen the clutch cover lock knob by pressing in and rotating counterclockwise. . Turn the chain tensioning dial clockwise to tension the chain. NOTE: A cold chain is correctly tensioned when there is no slack on the underside of the guide bar, the chain is snug, and it can be turned by hand without binding. . Retension the chain whenever the flats on the drive links hang out of the bar groove. NOTE: During normal saw operation, the temperature of the chain increases. The drive links of a correctly tensioned warm chain will hang approximately .050 in. out of the bar groove. The tip of the supplied combination wrench (UT10542, UT10562 and UT10582 only) can be used as a guide to help determine the correct warm chain tension. NOTE: New chains tend to stretch; check the chain tension frequently and tension as required. Fig. 44 . .050 in. Fig. 45 . .050 in. Fig. 46 CAUTION: A chain tensioned while warm may be too tight upon cooling. Check the “cold tension” before next use. Page 28 — English Page 29 — English Fig. 47 raker (depth gauge) clearance Fig. 48 maintenance CHAIN MAINTENANCE See Figures 47 - 48. CAUTION: Check that the switch is in the STOP “ ” position before you work on the saw. Use only a low-kickback chain on this saw. This fast-cutting chain provides kickback reduction when properly maintained. For smooth and fast cutting, maintain the chain properly. The chain requires sharpening when the wood chips are small and powdery, the chain must be forced through the wood during cutting, or the chain cuts to one side. During maintenance of the chain, consider the following: ¦n Improper filing angle of the side plate can increase the risk of severe kickback. n Raker (depth gauge) clearance. • Too low increases the potential for kickback. • Not low enough decreases cutting ability. n If the cutter teeth hit hard objects such as nails and stones, or are abraded by mud or sand on the wood, have an authorized service center sharpen the chain. Note: Inspect the drive sprocket for wear or damage when replacing the chain. If signs of wear or damage are present in the areas indicated, have the drive sprocket replaced by an authorized service center. NOTE: If you do not fully understand the correct procedure for sharpening the chain after reading the instructions that follow, have the saw chain sharpened by an authorized service center or replace with a recommended low-kickback chain. .025 in. inspect drive sprocket MAINTENANCE MAINTENANCE SHARPENING THE CUTTERS See Figures 49 - 52. Be careful to file all cutters to the specified angles and to the same length, as fast cutting can only be obtained when all cutters are uniform. WARNING: The saw chain is very sharp. Always wear protective gloves when performing maintenance to the chain to prevent serious personal injury. . Tension the chain prior to sharpening. Refer to Adjusting The Chain Tension. . Use a 5/32 in. diameter round file and holder. Do all of your filing at the midpoint of the bar. . Keep the file level with the top plate of the tooth. Do not let the file dip or rock. . Using light but firm pressure. Stroke t...

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